1.5 mm lift-off distance – one of the lowest on the market to date. One of the primary features of the ZOWIE EC-series is the lift-off distance. ZOWIE EC-series has made it possible to create one of the lowest lift-off distance currently available in any optical mouse on the market – 1.5 mm. Most optical mice are 125Hz which can be artificially raised to 500 – 1,000Hz through driver installations. The ZOWIE EC mice were the first optical mice to introduce 1,000 Hz from standard, without any installation of drivers. The mouse use an optical encoder instead of the cheaper traditional mechanical system and added a new optimized rolling system developed by ZOWIE, which ensures that the mouse wheel is the most durable and precise mouse wheel on the market today.